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db9cf24cea
linux/arch/x86/kvm
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Vipin Sharma db9cf24cea KVM: x86: hyper-v: Add extended hypercall support in Hyper-v 
Add support for extended hypercall in Hyper-v. Hyper-v TLFS 6.0b
describes hypercalls above call code 0x8000 as extended hypercalls.

A Hyper-v hypervisor's guest VM finds availability of extended
hypercalls via CPUID.0x40000003.EBX BIT(20). If the bit is set then the
guest can call extended hypercalls.

All extended hypercalls will exit to userspace by default. This allows
for easy support of future hypercalls without being dependent on KVM
releases.

If there will be need to process the hypercall in KVM instead of
userspace then KVM can create a capability which userspace can query to
know which hypercalls can be handled by the KVM and enable handling
of those hypercalls.

Signed-off-by: Vipin Sharma <vipinsh@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20221212183720.4062037-10-vipinsh@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
2023-02-01 13:46:00 -08:00
..
mmu KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
svm Merge branch 'kvm-lapic-fix-and-cleanup' into HEAD 2023-01-24 06:08:01 -05:00
vmx KVM: x86: Replace cpu_dirty_logging_count with nr_memslots_dirty_logging 2023-01-24 10:05:19 -08:00
.gitignore KVM: x86: use a separate asm-offsets.c file 2022-11-09 12:10:17 -05:00
cpuid.c KVM: x86/xen: update Xen CPUID Leaf 4 (tsc info) sub-leaves, if present 2023-01-24 10:05:20 -08:00
cpuid.h KVM: x86: Add dedicated helper to get CPUID entry with significant index 2022-07-14 11:38:32 -04:00
debugfs.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
emulate.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
fpu.h KVM: x86: Move FPU register accessors into fpu.h 2021-06-17 13:09:24 -04:00
hyperv.c KVM: x86: hyper-v: Add extended hypercall support in Hyper-v 2023-02-01 13:46:00 -08:00
hyperv.h KVM: x86: Hyper-V invariant TSC control 2022-12-29 15:33:29 -05:00
i8254.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
i8254.h KVM: x86: PIT: Preserve state of speaker port data bit 2022-06-08 13:06:20 -04:00
i8259.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
ioapic.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
ioapic.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
irq_comm.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
irq.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
irq.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
Kconfig KVM: Opt out of generic hardware enabling on s390 and PPC 2022-12-29 15:48:37 -05:00
kvm_cache_regs.h KVM: x86: start moving SMM-related functions to new files 2022-11-09 12:31:16 -05:00
kvm_emulate.h KVM: x86: do not define SMM-related constants if SMM disabled 2022-11-09 12:31:21 -05:00
kvm_onhyperv.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
kvm_onhyperv.h KVM: x86: Uninline and export hv_track_root_tdp() 2022-02-10 13:47:19 -05:00
kvm-asm-offsets.c KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly 2022-11-09 12:25:53 -05:00
lapic.c Merge branch 'kvm-lapic-fix-and-cleanup' into HEAD 2023-01-24 06:08:01 -05:00
lapic.h KVM: x86: Inhibit APIC memslot if x2APIC and AVIC are enabled 2023-01-13 10:45:25 -05:00
Makefile KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush() nested hook 2022-11-18 12:59:13 -05:00
mmu.h KVM: x86/mmu: Change tdp_mmu to a read-only parameter 2022-12-29 15:33:16 -05:00
mtrr.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
pmu.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
pmu.h KVM: x86/pmu: Prevent zero period event from being repeatedly released 2022-12-23 12:06:45 -05:00
reverse_cpuid.h Merge branch 'kvm-late-6.1' into HEAD 2022-12-29 15:36:47 -05:00
smm.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
smm.h KVM: x86: smm: preserve interrupt shadow in SMRAM 2022-11-09 12:31:26 -05:00
trace.h KVM: x86/xen: Add CPL to Xen hypercall tracepoint 2022-11-28 13:31:01 -05:00
tss.h
x86.c KVM: x86: Replace IS_ERR() with IS_ERR_VALUE() 2023-01-24 10:42:09 -08:00
x86.h KVM: x86: Track supported PERF_CAPABILITIES in kvm_caps 2022-11-09 12:31:11 -05:00
xen.c KVM: x86/xen: update Xen CPUID Leaf 4 (tsc info) sub-leaves, if present 2023-01-24 10:05:20 -08:00
xen.h KVM: x86/xen: update Xen CPUID Leaf 4 (tsc info) sub-leaves, if present 2023-01-24 10:05:20 -08:00